Dogfighting investigations spike in Philadelphia

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March 31, 2010 11:02:15 AM PDT

By PATRICK WALTERS

PHILADELPHIA - March 31, 2010 --

When humane officers responded to a North Philadelphia row home in February, they found pit bulls chained to spikes driven into the ground in the backyard. They seized treadmills, steroids and "break sticks" used to separate fighting dogs at the jaws.